Disclosed is a method and an extruder for making carbon blocks using poly (vinylidene fluoride) (PVDF) as binder and absorbents such as activated carbon.

Disclosed is a method and an extruder for making carbon blocks using poly (vinylidene fluoride) (PVDF) as binder and absorbents such as activated carbon.

An additive manufacturing system may include an extruder. The extruder may include a barrel having a bore. Additionally, the extruder may include an extruder screw at least partially received within the bore of the barrel. The additive manufacturing system also may include a gear pump fluidly coupled to the bore of the barrel. The extruder screw may extend at least partially into the gear pump.

A twin-screw extrusion kneader includes: two rotating shafts provided side by side in an internal space; a rotational driving portion configured to rotationally drive the rotating shafts; and paddles provided in the rotating shafts and configured to rotate along with the rotating shafts so as to knead a kneading material. Further, the twin-screw extrusion kneader includes movable portions provided as members constituting a part of the housing, the part of the housing including an inner wall surface of the housing, the inner wall surface being opposed to radially outer peripheral surfaces of the paddles. The movable portions can be moved in a direction to approach the paddles and in a direction to be distanced from the paddles. The twin-screw extrusion kneader can control the viscosity of electrode paste by moving the movable portions.

An additive manufacturing system may include an extruder. The extruder may include a barrel having a bore. Additionally, the extruder may include an extruder screw at least partially received within the bore of the barrel. The additive manufacturing system also may include a gear pump fluidly coupled to the bore of the barrel. The extruder screw may extend at least partially into the gear pump.

Processes for decrosslinking crosslinked plastic and devulcanizing vulcanized rubber include advancing such materials through single screw or twin screw extruders including special ultrasonic treatment zones wherein threadless shaft (single screw) or shafts (twin screw) rotate under an ultrasonic horn having a distal end aligned with the shaft or shafts and being shaped complimentary thereto. Special arcuate (single screw) or double-arcuate ultrasonic treatment flow paths confine the materials to flow under the horn where the material is subjected to ultrasonic waves to decrosslink the material, in the case of crosslinked plastic, or devulcanize the material, in the case of vulcanized rubber, with the extrudate leaving the die as a continuous stream or rope as is typical of virgin plastic or rubber.

Processes for decrosslinking crosslinked plastic and devulcanizing vulcanized rubber include advancing such materials through single screw or twin screw extruders including special ultrasonic treatment zones wherein threadless shaft (single screw) or shafts (twin screw) rotate under an ultrasonic horn having a distal end aligned with the shaft or shafts and being shaped complimentary thereto. Special arcuate (single screw) or double-arcuate ultrasonic treatment flow paths confine the materials to flow under the horn where the material is subjected to ultrasonic waves to decrosslink the material, in the case of crosslinked plastic, or devulcanize the material, in the case of vulcanized rubber, with the extrudate leaving the die as a continuous stream or rope as is typical of virgin plastic or rubber.

A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.

A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.

An extruder is disclosed, and more particularly, to an integrated single screw extruder and a twin screw extruder for mixing, compounding, kneading and/or extruding of materials. The integrated extruder includes a first barrel assembly and a second barrel assembly. The integrated extruder further includes a first screw having a first threaded portion and a second threaded portion. The first threaded portion is housed within the first barrel assembly and is configured to provide upstream material processing. The second threaded portion is housed within the second barrel assembly and is configured to provide downstream material processing. The integrated extruder further includes a second screw having a non-threaded shaft portion and a threaded portion. The threaded portion of the second screw is housed within the second barrel assembly and is configured to provide the downstream material processing with the second threaded portion of the first screw.